EP3273612A1 - Procédé et appareil permettant un accès aléatoire dans un système de communication sans fil - Google Patents

Procédé et appareil permettant un accès aléatoire dans un système de communication sans fil Download PDF

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Publication number
EP3273612A1
EP3273612A1 EP17181357.9A EP17181357A EP3273612A1 EP 3273612 A1 EP3273612 A1 EP 3273612A1 EP 17181357 A EP17181357 A EP 17181357A EP 3273612 A1 EP3273612 A1 EP 3273612A1
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European Patent Office
Prior art keywords
random access
trp
cell
access procedure
signal
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EP17181357.9A
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German (de)
English (en)
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EP3273612B1 (fr
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Hsin-Hsi TSAI
Yu-Hsuan Guo
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Asustek Computer Inc
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Asustek Computer Inc
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H04W74/0841—Random access procedures, e.g. with 4-step access with collision treatment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0404—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas the mobile station comprising multiple antennas, e.g. to provide uplink diversity
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0602—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using antenna switching
    • H04B7/0608—Antenna selection according to transmission parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/20—Interfaces between hierarchically similar devices between access points

Definitions

  • This disclosure generally relates to wireless communication networks, and more particularly, to a method and apparatus for random access in a wireless communication system.
  • IP Internet Protocol
  • An exemplary network structure is an Evolved Universal Terrestrial Radio Access Network (E-UTRAN).
  • E-UTRAN Evolved Universal Terrestrial Radio Access Network
  • the E-UTRAN system can provide high data throughput in order to realize the above-noted voice over IP and multimedia services.
  • a new radio technology for the next generation e.g., 5G
  • 5G next generation
  • changes to the current body of 3GPP standard are currently being submitted and considered to evolve and finalize the 3GPP standard.
  • a user equipment performs a first attempt of a random access procedure to communicate with a cell via at least a first UE beam.
  • the UE performs a second attempt of the random access procedure to communicate with the cell via at least a second UE beam when the first attempt fails, in which the direction of the first UE beam and the direction of the second UE beam are different.
  • Wireless communication systems are widely deployed to provide various types of communication such as voice, data, and so on. These systems may be based on code division multiple access (CDMA), time division multiple access (TDMA), orthogonal frequency division multiple access (OFDMA), 3GPP LTE (Long Term Evolution) wireless access, 3GPP LTE-A or LTE-Advanced (Long Term Evolution Advanced), 3GPP2 UMB (Ultra Mobile Broadband), WiMax, NR (New Radio) access technology, or some other modulation techniques.
  • CDMA code division multiple access
  • TDMA time division multiple access
  • OFDMA orthogonal frequency division multiple access
  • 3GPP LTE Long Term Evolution
  • 3GPP LTE-A or LTE-Advanced Long Term Evolution Advanced
  • 3GPP2 UMB User Mobile Broadband
  • WiMax Wireless Broadband
  • NR New Radio
  • the exemplary wireless communication systems devices described below may be designed to support one or more standards such as the standard offered by a consortium named "3rd Generation Partnership Project" referred to herein as 3GPP, including: R2-162366, Beam Forming Impact; R2-163716, Discussion on terminology of beamforming based high frequency NR; R2-162709, Beam support in NR; R2-162762, Active Mode Mobility in NR: SINR drops in higher frequencies; R3-160947, TR 38.801 V0.1.0, Study on New Radio Access Technology; Radio Access Architecture and Interfaces; R2-164306, Summary of email discussion [93bis#23][NR] Deployment scenarios; RAN2#94 meeting minutes; R2-163879, RAN2 Impacts in HF-NR; R2-162210, Beam level management ⁇ -> Cell level mobility; R2-163471, Cell concept in NR; R2-164270, General considerations on LTE-NR tight interworking; TS 36.300; R2-162251, RAN2 aspects of high frequency
  • FIG. 1 shows a multiple access wireless communication system according to one embodiment of the invention.
  • An access network 100 includes multiple antenna groups, one including 104 and 106, another including 108 and 110, and an additional including 112 and 114. In FIG. 1 , only two antennas are shown for each antenna group, however, more or fewer antennas may be utilized for each antenna group.
  • Access terminal 116 is in communication with antennas 112 and 114, where antennas 112 and 114 transmit information to access terminal 116 over forward link 120 and receive information from access terminal 116 over reverse link 118.
  • Access terminal (AT) 122 is in communication with antennas 106 and 108, where antennas 106 and 108 transmit information to access terminal (AT) 122 over forward link 126 and receive information from access terminal (AT) 122 over reverse link 124.
  • communication links 118, 120, 124 and 126 may use different frequency for communication.
  • forward link 120 may use a different frequency then that used by reverse link 118.
  • antenna groups each are designed to communicate to access terminals in a sector of the areas covered by access network 100.
  • the transmitting antennas of access network 100 may utilize beamforming in order to improve the signal-to-noise ratio of forward links for the different access terminals 116 and 122. Also, an access network using beamforming to transmit to access terminals scattered randomly through its coverage causes less interference to access terminals in neighboring cells than an access network transmitting through a single antenna to all its access terminals.
  • An access network may be a fixed station or base station used for communicating with the terminals and may also be referred to as an access point, a Node B, a base station, an enhanced base station, an evolved Node B (eNB), or some other terminology.
  • An access terminal may also be called user equipment (UE), a wireless communication device, terminal, access terminal or some other terminology.
  • FIG. 2 is a simplified block diagram of an embodiment of a transmitter system 210 (also known as the access network) and a receiver system 250 (also known as access terminal (AT) or user equipment (UE) in a Multiple Input Multiple Output (MIMO) system 200.
  • a transmitter system 210 also known as the access network
  • a receiver system 250 also known as access terminal (AT) or user equipment (UE) in a Multiple Input Multiple Output (MIMO) system 200.
  • traffic data for a number of data streams is provided from a data source 212 to a transmit (TX) data processor 214.
  • TX transmit
  • each data stream is transmitted over a respective transmit antenna.
  • Transmission (TX) data processor 214 formats, codes, and interleaves the traffic data for each data stream based on a particular coding scheme selected for that data stream to provide coded data.
  • the coded data for each data stream may be multiplexed with pilot data using OFDM techniques.
  • the pilot data is typically a known data pattern that is processed in a known manner and may be used at the receiver system to estimate the channel response.
  • the multiplexed pilot and coded data for each data stream is then modulated (i.e., symbol mapped) based on a particular modulation scheme (e.g., BPSK, QPSK, M-PSK, or M-QAM) selected for that data stream to provide modulation symbols.
  • a particular modulation scheme e.g., BPSK, QPSK, M-PSK, or M-QAM
  • the data rate, coding, and modulation for each data stream may be determined by instructions performed by processor 230.
  • TX MIMO processor 220 may further process the modulation symbols (e.g., for OFDM).
  • TX MIMO processor 220 then provides N T modulation symbol streams to N T transmitters (TMTR) 222a through 222t.
  • TMTR TX MIMO processor 220 applies beamforming weights to the symbols of the data streams and to the antenna from which the symbol is being transmitted.
  • Each transmitter 222 receives and processes a respective symbol stream to provide one or more analog signals, and further conditions (e.g., amplifies, filters, and upconverts) the analog signals to provide a modulated signal suitable for transmission over the MIMO channel.
  • N T modulated signals from transmitters 222a through 222t are then transmitted from N T antennas 224a through 224t, respectively.
  • the transmitted modulated signals are received by N R antennas 252a through 252r and the received signal from each antenna 252 is provided to a respective receiver (RCVR) 254a through 254r.
  • Each receiver 254 conditions (e.g., filters, amplifies, and downconverts) a respective received signal, digitizes the conditioned signal to provide samples, and further processes the samples to provide a corresponding "received" symbol stream.
  • An RX data processor 260 then receives and processes the N R received symbol streams from N R receivers 254 based on a particular receiver processing technique to provide N T "detected" symbol streams.
  • the RX data processor 260 then demodulates, deinterleaves, and decodes each detected symbol stream to recover the traffic data for the data stream.
  • the processing by RX data processor 260 is complementary to that performed by TX MIMO processor 220 and TX data processor 214 at transmitter system 210.
  • a processor 270 periodically determines which pre-coding matrix to use (discussed below). Processor 270 formulates a reverse link message comprising a matrix index portion and a rank value portion.
  • the reverse link message may comprise various types of information regarding the communication link and/or the received data stream.
  • the reverse link message is then processed by a TX data processor 238, which also receives traffic data for a number of data streams from a data source 236, modulated by a modulator 280, conditioned by transmitters 254a through 254r, and transmitted back to transmitter system 210.
  • the modulated signals from receiver system 250 are received by antennas 224, conditioned by receivers 222, demodulated by a demodulator 240, and processed by a RX data processor 242 to extract the reserve link message transmitted by the receiver system 250.
  • Processor 230 determines which pre-coding matrix to use for determining the beamforming weights then processes the extracted message.
  • FIG. 3 shows an alternative simplified functional block diagram of a communication device according to one embodiment of the invention.
  • the communication device 300 in a wireless communication system can be utilized for realizing the UEs (or ATs) 116 and 122 in FIG. 1 or the base station (or AN) 100 in FIG. 1 , and the wireless communications system is preferably the LTE system.
  • the communication device 300 may include an input device 302, an output device 304, a control circuit 306, a central processing unit (CPU) 308, a memory 310, a program code 312, and a transceiver 314.
  • the control circuit 306 executes the program code 312 in the memory 310 through the CPU 308, thereby controlling an operation of the communications device 300.
  • the communications device 300 can receive signals input by a user through the input device 302, such as a keyboard or keypad, and can output images and sounds through the output device 304, such as a monitor or speakers.
  • the transceiver 314 is used to receive and transmit wireless signals, delivering received signals to the control circuit 306, and outputting signals generated by the control circuit 306 wirelessly.
  • the communication device 300 in a wireless communication system can also be utilized for realizing the AN 100 in FIG. 1 .
  • FIG. 4 is a simplified block diagram of the program code 312 shown in FIG. 3 in accordance with one embodiment of the invention.
  • the program code 312 includes an application layer 400, a Layer 3 portion 402, and a Layer 2 portion 404, and is coupled to a Layer 1 portion 406.
  • the Layer 3 portion 402 generally performs radio resource control.
  • the Layer 2 portion 404 generally performs link control.
  • the Layer 1 portion 406 generally performs physical connections.
  • next generation i.e. 5G
  • the next generation access technology aims to support the following three families of usage scenarios for satisfying both the urgent market needs and the more long-term requirements set forth by the ITU-R IMT-2020: eMBB (enhanced Mobile Broadband); mMTC (massive Machine Type Communications); and URLLC (Ultra-Reliable and Low Latency Communications).
  • eMBB enhanced Mobile Broadband
  • mMTC massive Machine Type Communications
  • URLLC Ultra-Reliable and Low Latency Communications
  • An objective of the 5G study item on new radio access technology is to identify and develop technology components needed for new radio systems which should be able to use any spectrum band ranging at least up to 100 GHz.
  • Supporting carrier frequencies up to 100GHz brings a number of challenges in the area of radio propagation. As the carrier frequency increases, the path loss also increases.
  • the required cell coverage may be provided by forming a wide sector beam for transmitting downlink common channels.
  • the cell coverage is reduced with same antenna gain.
  • higher antenna gain is needed to compensate the increased path loss.
  • larger antenna arrays are used to form high gain beams.
  • the high gain beams are narrow compared to a wide sector beam so multiple beams for transmitting downlink common channels are needed to cover the required cell area.
  • the number of concurrent high gain beams that access point is able to form may be limited by the cost and complexity of the utilized transceiver architecture. In practice, on higher frequencies, the number of concurrent high gain beams is much less than the total number of beams required to cover the cell area. In other words, the access point is able to cover only part of the cell area by using a subset of beams at any given time.
  • beamforming is a signal processing technique used in antenna arrays for directional signal transmission/reception.
  • a beam can be formed by combining elements in a phased array of antennas in such a way that signals at particular angles experience constructive interference while others experience destructive interference.
  • Different beams can be utilized simultaneously using multiple arrays of antennas.
  • an eNB may have multiple TRPs (either centralized or distributed). Each TRP can form multiple beams. The number of beams and the number of simultaneous beams in the time/frequency domain depend on the number of antenna array elements and the radio frequency (RF) at the TRP.
  • Potential mobility type for New RAT (NR) can be intra-TRP mobility, inter-TRP mobility, and inter-NR eNB mobility.
  • a fairly regular grid-of-beams coverage patterns with tens or hundreds of candidate beams per node may be created.
  • the coverage area of an individual beam from such array may be small, down to the order of some tens of meters in width.
  • channel quality degradation outside the current serving beam area is quicker than in the case of wide area coverage, as provided by LTE.
  • one NR eNB corresponds to one or more Transmission/Reception Points (TRPs). And there are two levels of network controlled mobility: Radio Resource Control (RRC) driven at the "cell" level and zero/minimum RRC involvement (e.g., at Medium Access Control (MAC)/Physical (PHY)).
  • RRC Radio Resource Control
  • MAC Medium Access Control
  • PHY Physical
  • the principle of 2-level mobility handling may possibly be kept at cell level mobility (i.e., cell selection/reselection in IDLE, handover in Connected State (CONN) or handled by RRC in CONN state) or beam level management (i.e., L1 handles appropriate selection of the TRP to use for a UE and the optimal beam direction).
  • cell level mobility i.e., cell selection/reselection in IDLE, handover in Connected State (CONN) or handled by RRC in CONN state
  • beam level management i.e., L1 handles appropriate selection of the TRP to use for a UE and the optimal beam direction.
  • 5G systems are expected to rely more heavily on "beam based mobility” to handle UE mobility, in addition to regular handover based UE mobility. Technologies like Multiple Input Multiple Output (MIMO), fronthauling, Cloud RAN (C-RAN) and Network Function Virtualization (NFV) will allow the coverage area controlled by one "5G Node" to grow, thus increasing the possibilities for beam level management and reducing the need for cell level mobility. All mobility within the coverage area of one 5G node could in theory be handled based on beam level management, which would leave handovers only to be used for mobility to the coverage area of another 5G Node.
  • MIMO Multiple Input Multiple Output
  • C-RAN Cloud RAN
  • NFV Network Function Virtualization
  • Figures 8-11 show some examples of the concept of a cell in 5G NR.
  • Figure 8 shows different deployment scenarios with single TRP cell.
  • Figure 9 shows different deployment scenarios with multiple TRP cells.
  • Figure 10 shows one 5G cell comprising a 5G node with multiple TRPs.
  • Figure 11 shows a comparison between a LTE cell and a NR cell.
  • the random access procedure is performed for the following events related to the Primary Cell (PCell):
  • the random access procedure is also performed on a Secondary Cell (SCell) to establish time alignment for the corresponding Secondary Timing Advance Group (sTAG).
  • SCell Secondary Cell
  • sTAG Secondary Timing Advance Group
  • the random access procedure takes two distinct forms:
  • Normal DL/UL transmission can take place after the random access procedure.
  • RA Random Access
  • the four steps of the contention based random access procedures are:
  • the Temporary C-RNTI is promoted to C-RNTI for a UE which detects Random Access (RA) success and does not already have a C-RNTI; it is dropped by others.
  • RA Random Access
  • a UE which detects RA success and already has a C-RNTI resumes using its C-RNTI.
  • Non-contention based (Contention free) random access procedure is illustrated in Figure 13 .
  • Base Station a network central unit in NR which is used to control one or multiple TRPs which are associated with one or multiple cells. Communication between BS and TRP(s) is via fronthaul.
  • the BS could also be referred to as a central unit (CU), eNB, or NodeB.
  • Transmission/Reception Point a transmission and reception point provides network coverage and directly communicates with UEs.
  • the TRP could also be referred to as a distributed unit (DU).
  • DU distributed unit
  • a cell is composed of one or multiple associated TRPs, i.e. coverage of the cell is composed of coverage of all associated TRP(s).
  • One cell is controlled by one BS.
  • the Cell could also be referred to as TRP group (TRPG).
  • Beam sweeping in order to cover all possible directions for transmission and/or reception, a number of beams is required. Since it is not possible to generate all these beams concurrently, beam sweeping means to generate a subset of these beams in one time interval and change generated beam(s) in other time interval(s), i.e., changing beam in time domain. So, all possible directions can be covered after several time intervals.
  • a UE beam is a beam of a UE, which is used to communicate with the network, i.e., for transmission and/or reception.
  • a serving beam for a UE is a beam generated by network, e.g. a TRP, which is used to communicate with the UE, e.g., for transmission and/or reception.
  • network e.g. a TRP
  • the UE After an UE powers on, the UE needs to find a cell to camp on. Then, the UE may initiate a connection establishment to network by itself for registration and/or data transmission. Also, the network could request the UE to initiate a connection establishment to the network via paging, e.g. in order to transmit DL data to the UE.
  • a case of initial access may have the following steps:
  • Figure 14 illustrates an example of a flow chart for initial access.
  • the UE may move among different beams or TRPs of the cell when the UE is in non-connected state, e.g. idle mode. Or the UE may leave the coverage of the cell and move to coverage of other cell.
  • a case of mobility for UE in non-connected state may have the following types:
  • antenna gain by beamforming in eNB is considered about 15 to 30 dBi and the antenna gain of UE is considered about 3 to 20 dBi.
  • Figure 15 illustrates gain compensation by beamforming.
  • the UE When the UE is in connected state, the UE may move among different beams or TRPs of the same serving cell. Besides, if UE beamforming is used, UE beam(s) may also change over time, e.g. due to UE rotation.
  • a case of mobility in connected state without cell change has the following steps:
  • FIG. 17 and Figure 18 illustrate examples of flow charts for mobility in connected state without cell change.
  • the UE When the UE is in connected state, the UE may leave the coverage of the serving cell and move to coverage of another cell. It is assumed that the UE needs to perform measurement in order to help detection of a cell change.
  • the network would control the change of UE's serving cell, e.g., via handover.
  • a UE may be in the coverage of multiple TRPs of the cell.
  • the operations of random access procedure including failure cases (e.g. contention failure), should be considered.
  • Figure 19 illustrates an example of random access involving multiple TRPs.
  • Any information to be provided during the random access procedure such as, but not limited to, reduce power consumption, delay to complete the procedure, and/or possibility of contention, should be considered.
  • a cell would support both UEs using beamforming and UEs not using beamforming. These UEs may perform random access simultaneously. The impact of this factor should be analyzed and improved, if any.
  • a random access preamble transmitted by a UE may be received by one or multiple TRPs via their one or multiple beams, i.e. assuming that these TRPs share the same preamble resources. Then, the multiple responses to the preamble, e.g. Msg2, would be provided by multiple TRPs.
  • the UE Considering the random access mechanism in LTE as disclosed in 3GPP TS 36.321 as a baseline, the UE generally utilizes Uplink (UL) grant provided by the first received response to perform a Msg3 transmission. As a result, the resources for other response(s) may be unnecessarily wasted.
  • UL Uplink
  • Figure 21 shows that random access mechanism in LTE is used by UE1 in Figure 19 .
  • Figure 21 shows resources for Msg2 from TRP2 are unnecessarily wasted.
  • Figure 22 shows that random access contention occurs for UE1 and UE2 in Figure 19 .
  • Figure 22 shows resources for Msg2 from TRP2 are unnecessarily wasted.
  • Figure 22 shows that the first received response may not always be the most proper one.
  • Downlink (DL) and Uplink (UL) channels are reciprocal, e.g. Time Division Duplex (TDD), in the scenario that TRPs have beamforming capability but the UE has not, it is assumed that contention based random access procedure similar to LTE (e.g. there are four handshaking steps) would be used.
  • the random access procedure has the steps as illustrated in Figure 23 .
  • the UE would perform beam sweeping for selecting TRP as well as UE beam(s) for the random access procedure as shown in Figure 24 .
  • Figure 25 shows an example that if reciprocity for DL and UL is not assumed, e.g. Frequency Division Duplex (FDD), the beam(s) used for transmission may not be the same as beam(s) used for reception between a pair of UE and TRP.
  • FDD Frequency Division Duplex
  • the proper TRP beam(s) and UE beam(s) should be determined as soon as possible during the random access procedure.
  • the UE could select proper TRP beam(s), e.g. best or qualified beam(s), during TRP selection. Then, the UE could indicate, via Msg1, which beam(s) of TRP the UE suggests for transmission by the TRP. After receiving Msg1, the TRP could use the indicated beam(s) to transmit Msg2 and Msg4 without performing beam sweeping.
  • the UE could indicate, via Msg1, which UE beam(s) is used for Msg1 transmission.
  • the TRP could indicate, via Msg2, which UE beam(s) should be used by the UE to transmit Msg3.
  • the random access procedure has the steps as illustrated in Figure 27 .
  • Figure 28 show an example that if DL and UL channels are not reciprocal, e.g. FDD, the beam(s) used for transmission may not be the same as the beam(s) used for reception between a pair of UE and TRP.
  • the proper TRP beam(s) and UE beam(s) should be determined as soon as possible during the random access procedure.
  • the UE could select proper TRP beam(s), e.g. best or qualified beam(s), during monitoring broadcast signals from the TRPs. Then, the UE could use the selected beam(s) to receive Msg2. And the UE could indicate, via Msg3, which beam(s) of the TRP the UE suggests for transmission by the TRP. After receiving Msg3, the TRP could use the indicated beam(s) to transmit Msg4 without performing beam sweeping.
  • "qualified" as used herein can mean "better or greater than a threshold ".
  • the UE is necessary to perform beam sweeping to transmit Msg3 because the UE may not know which UE beam(s) for transmission is proper for the selected TRP.
  • the UE could indicate, via Msg3, which UE beam(s) is used for Msg3 transmission.
  • the TRP could indicate, via Msg4, which UE beam(s) should be used by the UE to transmit any following UL transmissions.
  • a dedicated preamble for a UE would be required. It is inefficient if the dedicated preamble needs to be reserved for the UE in all TRPs of a cell. Alternative means should be considered.
  • the UE could provide measured results related to TRP(s) (and beam(s)) of a neighbor cell.
  • a source BS could indicate the results to a target BS who controls a neighbor cell.
  • the target BS could decide which target TRP to reserve resources, e.g. dedicated preamble as well as PRACH resource, for the UE. Then, the source BS would provide the dedicated preamble as well as the PRACH resource associated with the target TRP to the UE.
  • the UE could implicitly or explicitly indicate which TRP the UE would like to access via Msg1, e.g. on PRACH, to help the TRPs decide whether to provide response(s), e.g. Msg2.
  • Msg1 e.g. on PRACH
  • implicit or explicit indication could be:
  • Msg2 e.g. random access response
  • TRP transmits the Msg2 for the UE to determine whether random access is successfully completed could be:
  • Figure 29 shows an example that if DL and UL channels are reciprocal, e.g. TDD, a target TRP could use beam(s) based on the indicated measured results to receive Msg1 and transmit Msg2 without performing beam sweeping.
  • DL and UL channels are reciprocal, e.g. TDD
  • a target TRP could use beam(s) based on the indicated measured results to receive Msg1 and transmit Msg2 without performing beam sweeping.
  • Figure 30 shows another example that if DL and UL channels are not reciprocal, e.g. FDD, the beam(s) used for transmission may not be the same as the beam(s) used for reception between a pair of UE and TRP.
  • a target TRP could only determine beam(s) for transmission based on the indicated measured results, and the target TRP may need to perform beam sweeping for receiving Msg1.
  • the UE is necessary to perform UE beam sweeping to transmit Msg1 because the UE may not know which UE beam(s) for transmission is proper for the target TRP.
  • the UE could indicate, via Msg1, which UE beam(s) is used for Msg1 transmission.
  • the target TRP could indicate, via Msg2, which UE beam(s) should be used by the UE to transmit following UL transmissions.
  • FIG. 32 is a flow chart 3200 according to one exemplary embodiment from the perspective of a UE.
  • a first attempt of a random access procedure is performed by the UE to communicate with a cell via at least a first UE beam.
  • a second attempt of the random access procedure is performed by the UE to communicate with the cell via at least a second UE beam when the first attempt fails, wherein the direction of the first UE beam and the direction of the second UE beam are different.
  • the second UE beam is selected based on a measurement.
  • the first UE beam is changed to the second UE beam when a number of failure attempts of the random access procedure is larger than or equal to a threshold.
  • a counter for a number of failure attempts is reset.
  • a counter for a number of failure attempts is not reset.
  • transmission power used for the random access procedure is reset.
  • transmission power used for the random access procedure is not reset.
  • buffered data to be transmitted via a third signal of the random access procedure is kept or not flushed.
  • the first attempt includes transmitting a first random access preamble via at least the first UE beam and the second attempt includes transmitting a second random access preamble via at least the second UE beam.
  • the first attempt fails if associated random access response or contention resolution cannot be received during a period of time.
  • the first UE beam is changed to the second UE beam based on a measurement.
  • the first random access preamble could be the same as the second random access preamble.
  • the first random access preamble could be different from the second random access preamble.
  • a network forms a cell comprising at least a first network node and a second network node.
  • the network allocates resources for random access procedure, wherein the resources associated with the first network node is different from the second network node.
  • the resources for random access procedure are preamble sequences.
  • the resources for the random access procedure can be time/frequency resources used to transmit a first signal of the random access procedure.
  • a UE performs a measurement to measure a signal in a cell, wherein the cell comprises multiple network nodes broadcasting the signal.
  • the UE preferably performs a random access procedure to communicate with a specific network node of the multiple network nodes, wherein the specific network node is determined by the UE based on the measurement.
  • the UE receives a configuration, e.g., via system information, used to perform the random access procedures from the specific network node.
  • the UE might receive the configuration, e.g., via system information, used to perform the random access procedures from a network node which is not the specific network node.
  • the configuration preferably includes parameters associated with different network nodes and the UE uses the part which is associated with the specific network node, based on the determination, to perform the random access procedure.
  • the parameters are preferably associated with preamble sequences. Alternatively or additionally preferably, the parameters are associated with time/frequency resources used to transmit a first signal of the random access procedure.
  • the signal includes a synchronization signal.
  • the synchronization signal includes one or more of a primary synchronization signal or secondary synchronization signal.
  • the signal includes a reference signal.
  • the reference signal preferably includes one or more of the following: cell-specific reference signal, MBSFN reference signal, UE-specific reference signal, positioning reference signal, CSI reference signal, discovery signal, and beam specific reference signal.
  • the signal can be used to identify a transmitter of the signal, e.g., namely which network node transmitted the signal.
  • the signal can be used to identify at least one beam (of a network node) used to transmit the signal.
  • the signal indicates information related to the specific network node.
  • the UE preferably indicates the information related to the specific network node via a first signal of the random access procedure, e.g. Msg1 in LTE.
  • the information can include: an identity of the network node, an identity of at least one beam (of a network node), and/or at least an identity of at least one beam (of a UE).
  • the information can be indicated together with a random access preamble, e.g. Msg1, during the random access procedure.
  • the information can be (implicitly) indicated via a preamble sequence selected by the UE.
  • the information can be (implicitly) indicated via a (time/frequency) resource used by the UE to transmit a preamble.
  • the information can be included in a first signal of the random access procedure, e.g. a message like Msg1 in LTE.
  • the UE transmits a first signal of the random access procedure in the cell and monitors at least a response of the first signal in the cell.
  • the UE will utilize the response if the response is transmitted by the specific network node.
  • the UE will not utilize the response if the response is not transmitted by the specific network node.
  • the specific network node is determined by the UE based on the measurement means that the UE selects a network node with qualified measured result from the measurement.
  • the specific network node is determined by the UE based on the measurement means that the UE selects a network node with best measured result from the measurement.
  • the UE preferably initiates the random access procedure after the UE determines the specific network node.
  • the UE might initiate the random access procedure before the UE determines the specific network node.
  • the network node receives a first signal of a random access procedure from a UE.
  • the network node then derives a destination of the first signal.
  • the network node transmits a second signal of the random access procedure to the UE to respond to the first signal if the destination is the network node.
  • the destination can be a network node identity.
  • the network node does not respond to the first signal if the destination is not the network node.
  • the network node can derive the destination based on a preamble sequence of the first signal.
  • the network node can derive the destination by a (time/frequency) resource used by the first signal.
  • the network node can derive the destination by decoding the first signal.
  • the network node receives a first signal of a random access procedure from a UE.
  • the network node transmits a second signal of the random access procedure to the UE to respond to the first signal, wherein the second signal indicates information of the network node.
  • the information includes an identity of the network and/or an identity of at least one beam (of the network node).
  • the information can be calculated in a sequence such as RA-RNTI.
  • a UE performs a random access procedure to communicate with a cell.
  • the UE transmits a first signal of the random access procedure in the cell.
  • the UE monitors at least a response of the first signal in the cell.
  • the UE determines whether to utilize the response based on received signal quality of the response.
  • the UE utilizes the response if the signal quality is larger than or equal to a threshold.
  • the UE utilizes the response if the signal quality is the best among all of the received responses during a period of time.
  • the UE utilizes the response if the signal quality is qualified.
  • the response is a message like Msg2 of the random access procedure in LTE.
  • monitoring means receiving the response of the first signal (for a period of time).
  • the UE can stop monitoring.
  • the UE can continue monitoring another response.
  • "utilizing the response” means to apply information included in the response, e.g. RA-preamble identifier, Timing Alignment information, initial UL grant, or Temporary C-RNTI.
  • the signal quality can be related to the strength of the signal, (e.g., received power), channel quality, and/or the number of qualified beams of the network node.
  • a UE performs a first attempt of a random access procedure to communicate with a first network node of a cell. The UE then performs a second attempt of the random access procedure to communicate with a second network node of the cell when the first attempt fails, wherein the first network node is changed to the second network node based on a measurement.
  • the second network node is selected based on the measurement.
  • the first UE network node is changed to the second network node when a number of failure attempts of the random access procedure is larger than or equal to a threshold.
  • a counter for a number of failure attempts is reset.
  • a counter for a number of failure attempts is not reset.
  • a counter used to count the number of network node changes during the random access procedure is increased.
  • transmission power used for the random access procedure is reset.
  • transmission power used for the random access procedure is not reset.
  • buffered data to be transmitted via a third signal of the random access procedure is kept or not flushed.
  • a UE performs a random access procedure to communicate with a cell.
  • the UE then transmits a signal of the random access procedure via at least a UE beam, wherein the signal indicates information of the UE beam.
  • the signal is a first signal.
  • the signal is a third signal.
  • the information is an identity related to at least a UE beam of the UE.
  • a network node receives a signal of a random access procedure from a UE, wherein the signal indicates information of at least a UE beam of the UE.
  • the network node transmits another signal to the UE to indicate the information.
  • the "signal" is a first signal.
  • the "signal” is a third signal.
  • the "another signal” is a second signal like Msg2 of the random access procedure in LTE.
  • the "another signal” is a forth signal like Msg4 of the random access procedure in LTE.
  • the “another signal” is always transmitted after the "signal.”
  • the information is an identity related to at least a beam of the UE.
  • a network node of a cell transmits a signal to a UE to trigger a random access procedure to communicate with another network node of another cell comprising multiple network nodes, wherein the signal comprises information of the another network node.
  • the signal is a message like Msg0 of the random access procedure in LTE.
  • the signal can be transmitted via HO command.
  • the signal can be transmitted via PDCCH.
  • the signal includes a non-contention random access preamble.
  • the measurement preferably measures the strength of the signal, e.g., received power.
  • the measurement can be used to measure channel quality between the UE and the network node.
  • the measurement can be used to measure the number of qualified beams of the network node.
  • the qualified beam preferably means that strength of the signal is larger than or equal to a threshold.
  • the qualified beam or the qualified network node means that the channel quality is larger than or equal to a threshold.
  • the qualified network node means that a number of qualified beams of the network node is larger than a threshold.
  • the first signal can be a signaling carrying part or all content of Msg1 in LTE.
  • the second signal can be a signaling carrying part of all content of Msg2 in LTE.
  • the third signal is similar to Msg3 of the random access procedure in LTE.
  • the information is preferably an identity.
  • the information is provided explicitly or provided implicitly (e.g., derived from other information).
  • the measurement can be performed with or without UE beamforming.
  • the UE performs the measurement by at least measuring a synchronization signal of a cell.
  • the UE performs the measurement by at least measuring a reference signal of a cell.
  • the UE performs the measurement by at least measuring a discovery signal of a cell.
  • the random access procedure can be contention-based. Alternatively, the random access procedure can be non-contention based (i.e. contention free). In the various preferred methods, preferably the random access procedure is initiated by the network node. Alternatively preferably, the random access procedure is initiated by the UE. In the various preferred methods, the downlink and uplink are reciprocal. Alternatively preferably, downlink and uplink are not reciprocal.
  • the cell is a serving cell of the UE, and the "another cell" is a neighbor cell of the UE.
  • the cell includes one network node.
  • the cell includes multiple network nodes.
  • the network node can be a central unit (CU), a distributed unit (DU), a transmission/reception point (TRP), a base station (BS), or a 5G node.
  • the network node is associated with a cell including multiple network nodes.
  • the UE beam is for transmission. Alternatively or additionally preferably, the UE beam is for reception. In the various preferred methods, preferably the UE is capable of using UE beamforming. In the various preferred methods, preferably the UE does not use UE beamforming if the cell doesn't support (or allow) UE beamforming.
  • the UE can use beam sweeping for transmission or reception. Alternatively, the UE does not use beam sweeping for transmission or reception.
  • the UE is in non-connected state.
  • the UE is in an idle state.
  • the UE is in an inactive state.
  • the UE is in a state where the UE has no RRC connection.
  • the UE is in a state where the UE has no connection to a core network.
  • the UE is in a state where the UE has no use data traffic for a period of time.
  • the UE is in a state where the UE mobility is loosely tracked by a network.
  • the UE is in connected state (or connected mode).
  • the device 300 includes a program code 312 stored in memory 310.
  • the CPU 308 could execute program code 312 to enable the UE (i) to perform a first attempt of a random access procedure to communicate with a cell via at least a first UE beam; and (ii) to perform a second attempt of the random access procedure to communicate with the cell via at least a second UE beam when the first attempt fails, wherein the direction of the first UE beam and the direction of the second UE beam are different.
  • the CPU 308 could execute program code 312 to enable the network (i) to form a cell comprising at least a first network node and a second network node; and (ii) to allocate resources for random access procedure, wherein the resources associated with the first network node is different from the second network node.
  • the CPU 308 could further execute program code 312 to enable the UE to (i) perform a measurement to measure a signal in a cell, wherein the cell comprises multiple network nodes broadcasting the signal; and (ii) perform a random access procedure to communicate with a specific network node of the multiple network nodes, wherein the specific network node is determined by the UE based on the measurement.
  • the CPU 308 could further execute program code 312 to enable the network node (i) to receive a first signal of a random access procedure from a UE; (ii) to derive a destination of the first signal; and (iii) to transmit a second signal of the random access procedure to the UE to respond to the first signal if the destination is the network node.
  • the CPU 308 could further execute program code 312 to enable the network node (i) to receive a first signal of a random access procedure from a UE; and (ii) to transmit a second signal of the random access procedure to the UE to respond to the first signal, wherein the second signal indicates information of the network node.
  • the CPU 308 could further execute program code 312 to enable the UE (i) to perform a random access procedure to communicate with a cell; and (ii) to transmit a first signal of the random access procedure in the cell; and (iii) to monitor at least a response of the first signal in the cell; and (iv) to determine whether to utilize the response based on received signal quality of the response.
  • the CPU 308 could further execute program code 312 to enable the UE (i) to perform a first attempt of a random access procedure to communicate with a first network node of a cell; and (ii) to perform a second attempt of the random access procedure to communicate with a second network node of the cell when the first attempt fails, wherein the first network node is changed to the second network node based on a measurement.
  • the CPU 308 could further execute program code 312 to enable the UE (i) to perform a random access procedure to communicate with a cell; and (ii) to transmit a signal of the random access procedure via at least a UE beam, wherein the signal indicates information of the UE beam.
  • the CPU 308 could further execute program code 312 to enable a network node (i) to receive a signal of a random access procedure from a UE, wherein the signal indicates information of at least a UE beam of the UE; and (ii) to transmit another signal to the UE to indicate the information of the UE beam.
  • the CPU 308 can execute the program code 312 to perform all of the above-described actions and steps or others methods described herein.
  • random access procedure is optimized, e.g. to reduce power consumption, delay, signaling overhead, waste of resources, and/or contention, and UE beamforming can be used more efficiently during random access procedure.
  • concurrent channels may be established based on pulse repetition frequencies.
  • concurrent channels may be established based on pulse position or offsets.
  • concurrent channels may be established based on time hopping sequences.
  • concurrent channels may be established based on pulse repetition frequencies, pulse positions or offsets, and time hopping sequences.
  • the various illustrative logical blocks, modules, and circuits described in connection with the aspects disclosed herein may be implemented within or performed by an integrated circuit ("IC"), an access terminal, or an access point.
  • the IC may comprise a general purpose processor, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components, electrical components, optical components, mechanical components, or any combination thereof designed to perform the functions described herein, and may execute codes or instructions that reside within the IC, outside of the IC, or both.
  • a general purpose processor may be a microprocessor, but in the alternative, the processor may be any conventional processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • a software module e.g., including executable instructions and related data
  • other data may reside in a data memory such as RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, a hard disk, a removable disk, a CD-ROM, or any other form of computer-readable storage medium known in the art.
  • a sample storage medium may be coupled to a machine such as, for example, a computer/processor (which may be referred to herein, for convenience, as a "processor") such the processor can read information (e.g., code) from and write information to the storage medium.
  • a sample storage medium may be integral to the processor.
  • the processor and the storage medium may reside in an ASIC.
  • the ASIC may reside in user equipment.
  • the processor and the storage medium may reside as discrete components in user equipment.
  • any suitable computer-program product may comprise a computer-readable medium comprising codes relating to one or more of the aspects of the disclosure.
  • a computer program product may comprise packaging materials.

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3496501A4 (fr) * 2016-08-05 2019-07-03 China Academy of Telecommunications Technology Procédé et dispositif d'accès à un réseau sans fil
WO2022005348A1 (fr) * 2020-06-30 2022-01-06 Telefonaktiebolaget Lm Ericsson (Publ) Rapport d'événement amélioré pour mobilité cellulaire à trp multiples
US11973559B2 (en) 2017-08-11 2024-04-30 Sony Corporation Retransmission of random access message based on control message from a base station

Families Citing this family (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11172444B2 (en) * 2016-10-10 2021-11-09 Qualcomm Incorporated Techniques for power control and management
CN114945195A (zh) 2016-11-02 2022-08-26 Idac控股公司 用于无线系统中的功率有效波束管理的设备和方法
BR112019008403A2 (pt) * 2016-11-03 2019-07-09 Guangdong Oppo Mobile Telecommunications Corp Ltd método de transmissão de sinais de link superior, e dispositivo terminal
KR20180049772A (ko) * 2016-11-03 2018-05-11 삼성전자주식회사 DSRC/IEEE 802.11p 와 LTE-V2X 공존을 위한 해결방법
EP3231101B1 (fr) * 2016-11-30 2020-01-08 Telefonaktiebolaget LM Ericsson (publ) Procédé et dispositif de transmission d'informations
US10681727B2 (en) * 2016-12-19 2020-06-09 Qualcomm Incorporated Uplink transmission parameter selection during random access message transmission and retransmission
KR102310719B1 (ko) * 2017-03-20 2021-10-08 삼성전자 주식회사 차세대 이동통신에서 대기 모드 동작을 효과적으로 하는 방법 및 장치
JP7065075B2 (ja) * 2017-03-23 2022-05-11 株式会社Ｎｔｔドコモ ユーザ装置、及びランダムアクセスプリアンブル送信方法
CN110999424B (zh) * 2017-06-16 2023-04-11 苹果公司 新无线电(nr)设备中的功率斜变和控制
US11259320B2 (en) * 2017-07-21 2022-02-22 Qualcomm Incorporated Multiple-beam uplink random access channel messages
US10841828B2 (en) * 2017-10-30 2020-11-17 Qualcomm Incorporated Disambiguation of random access response for random access support on supplemental uplink
JP6967607B2 (ja) * 2017-11-29 2021-11-17 株式会社Ｎｔｔドコモ 端末、無線通信システム及び通信方法
WO2019141898A1 (fr) * 2018-01-19 2019-07-25 Nokia Technologies Oy Récupération de défaillance de faisceau
US20210058797A1 (en) * 2018-01-26 2021-02-25 Ntt Docomo, Inc. Terminal and radio communication method
AU2018407143A1 (en) * 2018-02-07 2020-09-10 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Wireless communication method and device
CN111742579A (zh) * 2018-02-15 2020-10-02 株式会社Ntt都科摩 执行波束失败恢复过程的方法及用户装置
US11197324B2 (en) * 2018-02-23 2021-12-07 Qualcomm Incorporated NR RACH MSG3 and MSG4 resource configuration for CV2X
AU2018414599A1 (en) 2018-03-20 2020-10-15 Guangdong Oppo Mobile Telecommunications Corp., Ltd. Data transmission method and device
CN110324119B (zh) 2018-03-28 2020-10-27 维沃移动通信有限公司 针对波束失败的配置方法和终端
CN110351779A (zh) * 2018-04-03 2019-10-18 电信科学技术研究院有限公司 一种信息处理方法、装置、设备及计算机可读存储介质
WO2019194622A1 (fr) * 2018-04-06 2019-10-10 엘지전자 주식회사 Procédé de réglage d'avance temporelle de nœud de relais dans un système de communication de nouvelle génération et appareil correspondant
BR112020021198A2 (pt) * 2018-04-18 2021-01-19 Ntt Docomo, Inc. Terminal, método de radiocomunicação para um terminal e estação base em comunicação com um terminal
CN112425089B (zh) * 2018-05-18 2024-03-12 株式会社Ntt都科摩 终端及其无线通信方法、基站以及系统
EP3797541A1 (fr) * 2018-05-22 2021-03-31 Telefonaktiebolaget LM Ericsson (publ) Rapports d'état de tampon court pour de multiples groupes de canaux logiques
JP7284174B2 (ja) * 2018-08-09 2023-05-30 株式会社Ｎｔｔドコモ 端末、無線通信方法及びシステム
CN112789942A (zh) * 2018-08-09 2021-05-11 株式会社Ntt都科摩 用户终端以及无线通信方法
CN110859011B (zh) * 2018-08-25 2024-06-11 华为技术有限公司 一种通信方法及相关设备
EP3846572A4 (fr) * 2018-08-31 2021-09-22 Fujitsu Limited Procédé d'accès aléatoire, procédé de réception de données et dispositif associé, et système de communication
US11497060B2 (en) * 2018-10-01 2022-11-08 Mediatek Singapore Pte. Ltd. Multiplexing, addressing and HARQ for MsgB in two-step RACH in mobile communications
CN113597810B (zh) * 2019-03-28 2024-05-07 株式会社Ntt都科摩 用户装置以及通信方法
EP3986073A4 (fr) * 2019-06-17 2022-06-15 Beijing Xiaomi Mobile Software Co., Ltd. Procédé et appareil d'indication d'accès aléatoire, et support de stockage
WO2021038652A1 (fr) * 2019-08-23 2021-03-04 株式会社Ｎｔｔドコモ Terminal et procédé de communication sans fil
US20210195651A1 (en) * 2019-12-20 2021-06-24 Qualcomm Incorporated Beam sweep based random access msg 2
US11696333B2 (en) 2019-12-20 2023-07-04 Qualcomm Incorporated Beam sweep based random access msg 1 and msg 2
CN113453374B (zh) * 2020-03-24 2023-07-18 维沃移动通信有限公司 随机接入方法、随机接入处理方法、终端及网络设备
US11743742B2 (en) 2020-03-31 2023-08-29 Qualcomm Incorporated Beam sweep based random access msg 3 and msg 4
US20220078852A1 (en) * 2020-09-04 2022-03-10 Qualcomm Incorporated Beam indications during random access procedures
CN114501664B (zh) * 2020-10-23 2024-05-31 维沃移动通信有限公司 随机接入的方法、终端设备和网络设备
US11864225B2 (en) * 2021-04-22 2024-01-02 Qualcomm Incorporated Managing uplink spatial filter configuration
US20230058859A1 (en) * 2021-08-17 2023-02-23 Qualcomm Incorporated Wireless transmission reception point (trp) information exchange
US11621752B1 (en) * 2022-03-28 2023-04-04 Qualcomm Incorporated Transmit power violation protection mechanism in a radio unit of a disaggregated base station

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140376466A1 (en) * 2013-06-24 2014-12-25 Samsung Electronics Co., Ltd. Apparatus and method for adaptively determining tx beam subset for random access in wireless communication system

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2461780B (en) * 2008-06-18 2011-01-05 Lg Electronics Inc Method for detecting failures of random access procedures
US9585083B2 (en) * 2011-06-17 2017-02-28 Samsung Electronics Co., Ltd. Apparatus and method for supporting network entry in a millimeter-wave mobile broadband communication system
US9380582B2 (en) * 2012-04-16 2016-06-28 Samsung Electronics Co., Ltd. Methods and apparatus for flexible beam communications in random access in system with large number of antennas
US9699811B2 (en) * 2012-07-12 2017-07-04 Samsung Electronics Co., Ltd. Apparatus and method for random access with multiple antennas in a wireless network
CA2931885C (fr) 2013-12-09 2018-02-13 Huawei Technologies Co., Ltd. Procede de traitement de signal et station de base
CN104780617B (zh) 2014-01-09 2019-09-17 中兴通讯股份有限公司 一种非竞争随机接入方法、节点设备及系统
KR102179044B1 (ko) * 2014-08-08 2020-11-16 삼성전자 주식회사 무선 통신 시스템에서 수신 빔 이득 조정 장치 및 방법
KR102220286B1 (ko) * 2014-08-28 2021-02-25 삼성전자주식회사 이동 통신 시스템에서 빔 설정 방법 및 장치
KR102341215B1 (ko) * 2014-11-26 2021-12-20 삼성전자주식회사 빔포밍을 이용하는 이동 통신 시스템에서의 랜덤 액세스 기법
CN107211451B (zh) * 2014-11-26 2022-08-26 Idac控股公司 高频无线系统中的初始接入
KR20160081810A (ko) * 2014-12-30 2016-07-08 한국전자통신연구원 이동 통신 시스템에서의 랜덤 접속 처리 방법 및 장치
US20180027595A1 (en) 2015-02-13 2018-01-25 Telefonaktiebolaget Lm Ericsson (Publ) Methods and devices for random access
US20170026962A1 (en) * 2015-07-23 2017-01-26 Futurewei Technologies, Inc. Beam detection and tracking in wireless networks
KR102674427B1 (ko) * 2016-02-26 2024-06-13 삼성전자 주식회사 빔포밍이 적용된 시스템에서의 랜덤 액세스를 수행하는 장치 및 방법
US10009929B1 (en) * 2016-03-24 2018-06-26 Sprint Spectrum L.P. Contention-based random access
US10498406B2 (en) * 2016-05-26 2019-12-03 Qualcomm Incorporated System and method for beam switching and reporting
KR101680013B1 (ko) * 2016-06-30 2016-11-25 연세대학교 원주산학협력단 자단향 추출물을 유효성분으로 함유하는 알레르기성 질환 예방 또는 치료용 약학적 조성물

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20140376466A1 (en) * 2013-06-24 2014-12-25 Samsung Electronics Co., Ltd. Apparatus and method for adaptively determining tx beam subset for random access in wireless communication system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
SAMSUNG: "Random Access Procedure in NR", vol. RAN WG2, no. Nanjing, China; 20160523 - 20160527, 22 May 2016 (2016-05-22), XP051104903, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Meetings_3GPP_SYNC/RAN2/Docs/> [retrieved on 20160522] *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3496501A4 (fr) * 2016-08-05 2019-07-03 China Academy of Telecommunications Technology Procédé et dispositif d'accès à un réseau sans fil
US11297561B2 (en) 2016-08-05 2022-04-05 Datang Mobile Communications Equipment Co., Ltd. Access method and device for radio network
EP4243547A3 (fr) * 2016-08-05 2023-10-18 Datang Mobile Communications Equipment Co., Ltd. Procédé et dispositif d'accès à un réseau sans fil
US11973559B2 (en) 2017-08-11 2024-04-30 Sony Corporation Retransmission of random access message based on control message from a base station
WO2022005348A1 (fr) * 2020-06-30 2022-01-06 Telefonaktiebolaget Lm Ericsson (Publ) Rapport d'événement amélioré pour mobilité cellulaire à trp multiples

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US10681742B2 (en) 2020-06-09
EP3273612B1 (fr) 2018-11-14
CN107635242B (zh) 2021-01-15
KR101919705B1 (ko) 2018-11-20
TW201804854A (zh) 2018-02-01
TWI645736B (zh) 2018-12-21
KR20180009317A (ko) 2018-01-26
JP2018033129A (ja) 2018-03-01
CN107635242A (zh) 2018-01-26
ES2708423T3 (es) 2019-04-09
JP6543660B2 (ja) 2019-07-10
US20180020487A1 (en) 2018-01-18

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